MCSA/MCSE Self-Paced Training Kit (Exam 70-270): Installing ...

19-4 Chapter 19 Monitoring and Optimizing System Performance
By default, the Processes tab shows you the processes, the users running each process,
and the CPU and memory usage for each process that is running. You can add additional
performance measures to those that are shown by default on the Processes tab.
To add performance measures, on the View menu, click Select Columns (refer to Figure
19-2). Table 19-1 describes the columns that are displayed in Task Manager by
default and some of the columns that can be added to the Processes tab.
Table 19-1 Processes Tab Columns
Column Description
Image Name The name of the process, displayed by default.
PID (Process Identifier) The numeric identifier assigned to the process while it is running.
User Name The name of the user that the process is running under, displayed by
default.
CPU Usage The percentage of time the threads of the process used the processor
since the last update, displayed by default. If a process is consuming
a large amount of processor time over a long period (other than
when an application is first starting or is performing a particularly
intensive task), the process might be having trouble. Try closing the
application (by using the Applications tab).
CPU Time The total processor time (in seconds) used by the process since it was
started.
Memory Usage The amount of memory (in kilobytes) used by the process, displayed
by default. This column is particularly useful for determining which
applications are using memory because it displays the total amount of
physical and virtual memory used by an application. If an application
seems to be using too much memory, there might be a problem with
the application. Try closing the application and restarting it (or
restarting your computer and then restarting the application).
Base Priority The order in which threads are scheduled for the processor. The base
priority is not set by the operating system; it is set by the code. You
can use Task Manager to change the base priority of processes. To
change the base priority of a process, right-click the process and click
Set Priority.
Non-paged Pool The amount of memory (in kilobytes) that is used by a process; operating
system memory that is never paged (moved from memory) to
disk.
Paged Pool The amount of system-allocated virtual memory (in kilobytes) used
by a process; virtual memory that can be paged to disk. Paging is the
moving of infrequently used data from RAM to the paging file on the
hard disk.